5VUT

Structure of rat neuronal nitric oxide synthase heme domain in complex with 4-(2-(((2-Amino-4-methylquinolin-7-yl)methyl)amino)ethyl)benzonitrile

5VUT の概要

• エントリーDOI: 10.2210/pdb5vut/pdb
• 分子名称: Nitric oxide synthase, brain, PROTOPORPHYRIN IX CONTAINING FE, 5,6,7,8-TETRAHYDROBIOPTERIN, ... (7 entities in total)
• 機能のキーワード: nitric oxide synthase, inhibitor complex, heme enzyme, oxidoreductase-oxidoreductase inhibitor complex, oxidoreductase/oxidoreductase inhibitor
• 由来する生物種: Rattus norvegicus (Rat)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 100156.82

構造登録者

Li, H.,Poulos, T.L. (登録日: 2017-05-19, 公開日: 2017-08-16, 最終更新日: 2023-10-04)

主引用文献

Pensa, A.V.,Cinelli, M.A.,Li, H.,Chreifi, G.,Mukherjee, P.,Roman, L.J.,Martasek, P.,Poulos, T.L.,Silverman, R.B.
Hydrophilic, Potent, and Selective 7-Substituted 2-Aminoquinolines as Improved Human Neuronal Nitric Oxide Synthase Inhibitors.
J. Med. Chem., 60:7146-7165, 2017

PubMed Abstract: Neuronal nitric oxide synthase (nNOS) is a target for development of antineurodegenerative agents. Most nNOS inhibitors mimic l-arginine and have poor bioavailability. 2-Aminoquinolines showed promise as bioavailable nNOS inhibitors but suffered from low human nNOS inhibition, low selectivity versus human eNOS, and significant binding to other CNS targets. We aimed to improve human nNOS potency and selectivity and reduce off-target binding by (a) truncating the original scaffold or (b) introducing a hydrophilic group to interrupt the lipophilic, promiscuous pharmacophore and promote interaction with human nNOS-specific His342. We synthesized both truncated and polar 2-aminoquinoline derivatives and assayed them against recombinant NOS enzymes. Although aniline and pyridine derivatives interact with His342, benzonitriles conferred the best rat and human nNOS inhibition. Both introduction of a hydrophobic substituent next to the cyano group and aminoquinoline methylation considerably improved isoform selectivity. Most importantly, these modifications preserved Caco-2 permeability and reduced off-target CNS binding.

PubMed: 28776992
DOI: 10.1021/acs.jmedchem.7b00835

実験手法

X-RAY DIFFRACTION (2 Å)